/*模态框*/
h4{
    margin-left: 20px;
}
p{
    text-align: center;
}
.btn{
    width: 100px;
    height: 35px;
    border-radius: 5px;
    font-size: 16px;
    color: white;
    background-color: cornflowerblue;
}
.btn:hover, .btn:focus{
    background-color: #95b4ed;
}
.modal{
    display: none;
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;
    background-color: rgba(0,0,0,0.5);
}
.modal-content{
    display: flex;
    flex-flow: column nowrap;
    justify-content: space-between;
    width: 50%;
    max-width: 700px;
    height: 40%;
    max-height: 500px;
    margin: 100px auto;
    border-radius:10px;
    background-color:#fff;
    -webkit-animation: zoom 0.6s;
    animation: zoom 0.6s;
    resize: both;
    overflow: auto;
}
@-webkit-keyframes zoom{
    from {-webkit-transform: scale(0)}
    to {-webkit-transform: scale(1)}
}
@keyframes zoom{
    from {transform: scale(0)}
    to {transform: scale(1)}
}
.modal-header{
    box-sizing:border-box;
    border-bottom:1px solid #ccc;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.close{
    color: #b7b7b7;
    font-size: 30px;
    font-weight: bold;
    margin-right: 20px;
    transition: all 0.3s;
}
.close:hover, .close:focus{
    color: #95b4ed;
    text-decoration: none;
    cursor: pointer;
}
.modal-body{
    padding: 10px;
    font-size: 16px;
    box-sizing:border-box;
}
.modal-footer{
    box-sizing:border-box;
    border-top:1px solid #ccc;
    display: flex;
    padding: 15px;
    justify-content: flex-end;
    align-items: center;
}
.modal-footer button{
    width: 60px;
    height: 35px;
    padding: 5px;
    box-sizing: border-box;
    margin-right: 10px;
    font-size: 16px;
    color: white;
    border-radius: 5px;
    background-color: cornflowerblue;
}
.modal-footer button:hover, .modal-footer button:focus{
    background-color: #95b4ed;
    cursor: pointer;
}
@media only screen and (max-width: 700px){
    .modal-content {
        width: 80%;
    }
}